陆浑灌区渠道过流能力的计算分析与整治措施

发布时间：2018-03-15 00:18

本文选题：灌区改造　切入点：渠道过流能力　出处：《郑州大学》2016年硕士论文　论文类型：学位论文

【摘要】：陆浑灌区始建于1967年,受建设时期的历史背景、社会情况、投资政策和施工水平的限制,存在设计标准较低、配套设施较差、遗留尾工较大等问题；同时灌区经过近五十年的运行,加上维修资金不足和管理体制较落后,暴露出的问题愈来愈多,尤其是渠道过流能力不足,严重影响了灌区的安全运行、效益发挥和持续发展。本文针对陆浑灌区渠道过流能力展开研究,主要内容如下：(1)采用JAVA编制了渠道水面线计算程序,该程序可应用于计算棱柱体渠道水面线和非棱柱体渠道水面线两种情况。渠道水面线计算结果表明,实际断面水面线远高于设计断面水面线,说明渠道目前的过流量远低于设计流量,同时通过分析找出了渠道过流能力的影响因素,定量分析了各因素的影响程度,提出了渠道的改造措施。(2)采用FLUENT模拟弯道三维水流运动,通过ICEM进行前处理,质量守恒方程和雷诺平均N-S方程作为控制方程,RNG k-ε涡粘性紊流模型封闭方程,有限体积法离散化方程,水气两相流VOF模型追踪自由水面,常规SIMPLE算法求解以及CFD-Post进行后处理,得到了不同流量工况下明渠弯道水流的纵向水面线、横向水面线和弯道环流结果,并将数值模拟结果与编程计算结果进行比较,分析总结了弯道对渠道水流水面线的影响。
[Abstract]:Luhun Irrigation District was founded in 1967, which is restricted by the historical background, social situation, investment policy and construction level of the construction period. At the same time, after nearly 50 years of operation, combined with insufficient maintenance funds and backward management system, more and more problems have been exposed, especially insufficient channel overflow capacity, which has seriously affected the safe operation of irrigation areas. The main contents of this paper are as follows: 1) using JAVA to compile the calculation program of channel surface line. The program can be used to calculate the water surface line of the prism channel and the water surface line of the non-prism channel. The results show that the actual section water surface line is much higher than the design section water surface line. It shows that the current channel overflow is far lower than the design flow. At the same time, the influencing factors of channel overcurrent capacity are found through analysis, and the influence degree of each factor is quantitatively analyzed. In this paper, the improvement measure of channel is put forward. FLUENT is used to simulate the three-dimensional flow motion of curved channel. The mass conservation equation and the Reynolds average N-S equation are used as the governing equations to simulate the three-dimensional flow motion of the curved channel, and the mass conservation equation and the Reynolds average N-S equation are taken as the closed equations of the RNG k- 蔚 vortex viscous turbulence model. The finite volume method is used to discretize the equation, the VOF model of water and gas two-phase flow is used to track the free water surface, the conventional SIMPLE algorithm is solved and the CFD-Post is processed after processing. The longitudinal water surface line of the open channel bend flow is obtained under different flow conditions. The results of lateral water surface line and curve circulation are compared with the results of numerical simulation and programming, and the influence of curve on channel flow surface line is analyzed and summarized.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：S274;TV133

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